In Copan Archeological Park there is a Ceremonial Court just north of the Temple 4 and the Main Plaza. During the spring equinox, the stelas "F" and "C" in that court, --properly called now "Plaza del Sol" (Plaza of the Sun)-- look pretty much aligned with the sun at sunset, around 5:45pm. You need to make special arrangements with the Archeological Park authorities though, because the Park officially closes at 4pm. Quite an impressive view!